4.2/4.3 (day 1) Classifying Triangles

Front

What is a triangle classified by its sides and angles?

Back

A triangle can be classified by its sides as equilateral, isosceles, or scalene, and by its angles as acute, right, or obtuse.

Front

What defines an acute triangle?

Back

An acute triangle is a triangle where all three angles are less than 90 degrees.

Front

What defines a right triangle?

Back

A right triangle is a triangle that has one angle equal to 90 degrees.

Front

What defines an obtuse triangle?

Back

An obtuse triangle is a triangle where one angle is greater than 90 degrees.

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle that has at least two sides of equal length.

Front

What is a scalene triangle?

Back

A scalene triangle is a triangle where all three sides are of different lengths.

Front

How can you identify an acute isosceles triangle?

Back

An acute isosceles triangle has two equal sides and all angles are less than 90 degrees.

Front

How can you identify a right isosceles triangle?

Back

A right isosceles triangle has two equal sides and one angle that is exactly 90 degrees.

Front

How can you identify a right scalene triangle?

Back

A right scalene triangle has all sides of different lengths and one angle that is exactly 90 degrees.

Front

What is the relationship between the angles in a triangle?

Back

The sum of the interior angles in any triangle is always 180 degrees.